Removed useless import.

src/zc/buildout/download.py

@@ -40,8 +40,7 @@ class ChecksumError(zc.buildout.UserError):
 url_opener = URLOpener()
 
 
-from zc.buildout.networkcache import get_sha256sum_from_networkcached, \
-                                     download_network_cached, \
+from zc.buildout.networkcache import download_network_cached, \
                                      upload_network_cached
 
 
@@ -180,6 +179,8 @@ class Download(object):
         self.logger.info('Downloading %s' % url)
         urllib._urlopener = url_opener
         handle, tmp_path = tempfile.mkstemp(prefix='buildout-')
+
+        try:
             try:
                 if not download_network_cached(self.network_cache, tmp_path,
                                                             url, self.logger):
@@ -192,15 +193,11 @@ class Download(object):
                     # Upload the file to networkcached.
                     upload_network_cached(self.network_cache, url,
                                                          tmp_path, self.logger)
-        except IOError, e:
-            os.remove(tmp_path)
-            raise zc.buildout.UserError("Error downloading extends for URL "
-                              "%s: %r" % (url, e[1:3]))
-        except Exception, e:
-            os.remove(tmp_path)
-            raise
             finally:
                 os.close(handle)
+        except:
+            os.remove(tmp_path)
+            raise
 
         if path:
             shutil.move(tmp_path, path)